240-Clamped PWM in Three Phase Grid-Connected PV Converter Application

Hafsa Qamar, Haleema Qamar, Rajapandian Ayyanar

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper presents the control scheme for a two-stage, grid connected Photovoltaic (PV) inverter that uses a low-loss PWM method called 240-Clamped PWM (240CPWM) in the DC-AC stage. The main advantage of using 240CPWM is that it results in at least 86% less switching loss with similar THD as compared to conventional space vector PWM (CSVPWM). In a typical grid connected PV converter with conventional PWM methods, the DC-DC stage is responsible for Maximum Power Point Tracking (MPPT) and DC-AC stage controls the DC link voltage and injects sinusoidal currents into the grid. With 240CPWM in the inverter, DC-DC stage can no longer track the MPP because it needs to control the DC link voltage dynamically in a six-pulse pattern. So, the DC-AC stage is designed to track the MPP with an outer slower loop and control the grid currents accordingly with an inner faster loop. Simulation and experimental results with a 10-kW prototype are shown with THD close to 5% and efficiency of the DC-AC stage with 240CPWM greater than 99%.

Original languageEnglish (US)
Title of host publication2021 IEEE Energy Conversion Congress and Exposition, ECCE 2021 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages340-346
Number of pages7
ISBN (Electronic)9781728151359
DOIs
StatePublished - 2021
Event13th IEEE Energy Conversion Congress and Exposition, ECCE 2021 - Virtual, Online, Canada
Duration: Oct 10 2021Oct 14 2021

Publication series

Name2021 IEEE Energy Conversion Congress and Exposition, ECCE 2021 - Proceedings

Conference

Conference13th IEEE Energy Conversion Congress and Exposition, ECCE 2021
Country/TerritoryCanada
CityVirtual, Online
Period10/10/2110/14/21

Keywords

  • 240-Clamped PWM (240CPWM)
  • conventional space vector PWM (CSVPWM)
  • Maximum Power Point Tracking (MPPT)
  • Photovoltaic (PV)
  • switching loss
  • THD

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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